[Kea-users] Subnet ID max value?

[Jonas]

There is a max value, and it is stated here:  9. The DHCPv4 Server — Kea
3.0.0 documentation
<https://kea.readthedocs.io/en/kea-3.0.0/arm/dhcp4-srv.html#ipv4-subnet-identifier>Subnet
IDs must be greater than zero and less than 4294967295.
It shouldn´t matter how large your network ID is(as long as it is within
accepted values)

On Wed, Aug 27, 2025 at 1:34 PM Jim <jim at wrightthisway.com> wrote:

> I’m working on migrating a DHCP server from RHEL 8 to 10, and consequently
> moving from dhcpd to kea.
>
> I’ve got more than 100 subnets defined in the old server that I’m
> recreating.  My big question is the ID for each subnet, I see no info in
> the docs on if there is a max value for this, and my second concern would
> be if using large(ish) values would have any performance impact.
>
> For example, I’m considering using IDs based on the subnet, such as:
>
> id: 10001001 // 10.100.1.0/24
> id: 192168001 // 192.168.1.0/24
> id: 192168020 // 192.168.20.0/24
>
> Has anyone done something similar?
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